const formatTime = date =>{
	let year = date.getFullYear()
	let month = date.getMonth() + 1
	let day = date.getDate()
	let hour = date.getHours()
	let minute = date.getMinutes()
	let second = date.getSeconds()
	return `${[year,month,day].map(formatNumber).join('-')} ${[hour,minute,second].map(formatNumber).join(':')}`
	
}

const formatNumber = n =>{
	n = n.toString()
	return n[1] ? n : `0${n}`
}

/**
 * 检查field长度是否符合要求
 * @param {String} field 要检查的字符串
 * @param {Number} minLen 符合要求的最小 长度
 * @param {String} name 用于提示用户的中文名
 */
function checkLength(field,minLen,name){
	if(field.length >= minLen){
		return true
	}
	let message = `${name}不能少于${minLen}个字符`
	if(field.length ==0){
		message = `${name}不能为空`
	}
	uni.showToast({
		title:message,
		icon:'none'
	});
	return false
}
/**
 *  为字符串实现ellipsis功能
 * @param {String} value 需要折叠的字符串
 * @param {Object} len 允许显示的最大长度  
 
*/
function ellipsis(value, len){
	if(value && value.length > len){
		return `${value.substr(0, len -3)}...`
	}
	return value
}

/**
 * @param {Array} array 原始数组
 */

function distinct(array){
	let result = []
	let obj = {}
	for (let i of array) {
		if(!Object[i.toLowerCase()]){
			result.push(i)
			obj[i.toLowerCase()] = 1
		}		
	}
	return result 
}
module.exports = {
	formatTime,
	checkLength,
	ellipsis,
	distinct
}